EdbMails EDB Recovery and Migration software
  • Reseller
  • Free Trial
  • Video Tutorials
  • Support
  • FAQ
  • Free Tools
  • Knowledge Base
  • Products
    Exchange EDB / Email Recovery Tools
    • EDB Recovery and MigrationRecover EDB to PST, EDB to Office 365 and Exchange NO Duplicate Migration
    • OST Recovery and MigrationRecover OST to PST, OST to Office 365 and Exchange Migration
    • PST Recovery and MigrationRecover Outlook PST, PST to Office 365 and Exchange Migration
    • MBOX Export and MigrationExport MBOX to PST, MBOX to Office 365 and Exchange Migration
    • NSF Export and MigrationExport NSF to PST, NSF to Office 365 and Exchange Migration
    Exchange and Office 365 Migration
    • Exchange Server MigrationMigrate Exchange 2007, 2010, 2013, 2016, 2019 to Office 365 tenants. Also, migrate between Exchange servers and PST
    • Office 365 MigrationMigrate Source Office 365 tenants to Destination Office 365 tenants. Also, migrate to Exchange Server and PST
    • IMAP Email Backup & MigrationMigrate all IMAP email servers (Gmail, Zimbra, Zoho, Yahoo etc.), Office 365, Exchange and Backup to Outlook PST
    • SharePoint Online MigrationMigrate documents, files and folders from SharePoint sites
    • OneDrive for Business MigrationMigrate documents, files and folders from OneDrive
    • Microsoft Teams MigrationMigrate Teams, documents, files and folders etc.
    Exchange and Office 365 Backup
    • Office 365 BackupIncremental, Granular, Encrypted and Compressed Office 365 Mailboxes Backup
    • Exchange Server BackupIncremental, Granular, Encrypted and Compressed Exchange Mailboxes Backup
    • SharePoint, OneDrive & Teams BackupBackup Online site collections, Team sites, Office 365 groups, all documents etc.
    • Duplicate Remover - Office 365 & Exchange Remove duplicate emails, calendars, contacts, journal etc. from Office 365 and Exchange
    • GAL and All Address Lists migrationDirectly migrate Exchange and Office 365 Global address list and Address Lists items
    Go to products
  • Pricing
  • Features
  • Download
  • Account

Knowledge Basemagnifier-glass

Get an instant help and tips on how to use and get the most out of your EdbMails tools.

  • Video Tutorials
  • FAQ's
  • Support
  • Personalized Demo

How can we help you?

Blog » Exchange Migration

Resolve Invalid MIME content

Problem:

When you migrate to Exchange or Office 365 by using EdbMails Exchange migration or Office 365 Migration software, you may encounter one of the following errors in the EdbMails log report.

Error while uploading package. System.Exception: [ErrorMimeContentInvalidBase64String] - Invalid base64 string for MIME content.

Error while uploading package. System.Exception: [ErrorMimeContentInvalid] - Invalid MIME content.

Resolution:

The invalid MIME content indicates that the mail items are corrupted. This error normally occurs when the properties of the items that are necessary for migration are either missing or broken although you can access them in Outlook or OWA. The destination MS Exchange Server EWS service requires that the migrated items are in a healthy state and rejects them if the items are corrupted.

MS Outlook can repair damaged files and items if the issue only affects a small number of these items and mailboxes.

Steps to resolve invalid MIME contents using MS Outlook

  1. Create a temporary storage location on your computer for files with the damaged MIME content
  2. Launch Microsoft Outlook.
  3. Check your mailbox for the damaged mails. Most likely, you can open them in Microsoft Outlook without any problems. To identify the corrupted items, check the EdbMails log files first
  4. Copy the corrupted items from MS Outlook into the temporary folder you created in step 1
  5. From Microsoft Outlook, remove the damaged items permanently. To remove such items, select them from your mailbox and press 'Shift+Delete'
  6. Drag the items from the temporary folder (See step 4) into MS Outlook. While performing this step, make sure to copy the items into the same mailbox folder from which they were originally taken.
  7. Wait a couple of minutes to synchronize Outlook with the Exchange Server
  8. Close Microsoft Outlook and perform the migration with EdbMails

If the preceding steps do not assist or there are too many corrupted items, you can exclude such items from the migration using the 'Settings' option in EdbMails Migration window.



Related topics:

  • How to switch mailboxes to Office 365 in a Hybrid environment?
  • Target server mailbox addresses cannot be resolved
  • Prerequisites for the Hybrid deployment
  • Troubleshooting Public Folder Migration
  • Exchange Server Backup Pricing
  • Exchange Migration Pricing
  • Verify mailbox accessibility using EWS
  • The Exchange server version is invalid or is unavailable
  • The credentials specified are invalid (302)
  • Mailbox Store Unavailable
hidden msg

EdbMails Demo / Trial Version

Step 1. Download and install EdbMails

Step 2. Click the 'Start Your Free Trial' button

Demo login EdbMails

  • Home
  • Features
  • Pricing
  • Support
  • Download
  • Sitemap
  • FAQ
  • Video Tutorials
  • Technical Support
  • Live Chat
  • Contact Us
Shifttocloud Inc.
Rehoboth Beach, DE
United States
+1 (302) 416-3056

Privacy Policy | Terms of Use | GDPR | Security | Press Releases

© 2023 Shifttocloud Inc.

Live Chat

Hi, May I help you?

Hide Chat Now